/Engine/Source/Runtime/Engine/Classes/Materials/MaterialInterface.h
virtual void GetAllParametersOfType ( EMaterialParameterType Type, [TMap](API\Runtime\Core\Containers\TMap)< [FMaterialParameterInfo](API\Runtime\Engine\FMaterialParameterInfo), [FMaterialParameterMetadata](API\Runtime\Engine\FMaterialParameterMetadata) > & OutParameters ) const